no. 2070. PARASITIC AND PREDACEOUS DIPTERA— WALTON. 181 



with pollen. Frontal vitta opaque black. Antennae black, third 

 joint in female distinctly longer than second, in male about same 

 length as second. Palpi brownish, proboscis dark brown. ' Arista 

 black, bare, bulbous at extreme base, second joint not longer than 

 broad. Lower occiput with whitish hairs. Thorax and scutellum 

 black, uniform frosty pollinose. Vittas almost obsolete. Post- 

 suturals three, sterno-pleurals two. Abdomen elongate ovate, shin- 

 ing black, bases of second and third segments silvery pollinose, first 

 three segments bearing marginal macrochaetse only, fourth bearing 

 discals also. Legs, including tarsi, black, middle tibise bearing two 

 macrochaetse, one long and one short, on the front side near middle. 

 Claws of male elongate. Pulvilli white. Calypters white. Wings 

 milky, strongly infuscated along costal border extending dilutely into 

 first posterior cell, which is closed and petiolate. The petiole slightly 

 longer than anterior cross vein, third vein bearing a row of from two to 

 five rather long bristles on basal third. Veins black excepting fifth 

 longitudinal and those inclosing second and third basal cells, which 

 are pale. Anal vein does not reach posterior margin of wing. Ten 

 specimens, male and female, collected on sunflowers August 1-12 on 

 prairie. This pretty species presents an odd sight in nature, as it has 

 the habit of extending the wings at right angles to the body, walking 

 about with them in this position like some Ortalids, a habit unusual 

 among Tachinidse. 



Genus TACHINOPHYTO Townsend. 



TACHINOPHYTO DUNNINGH. 



Several specimens from mesa, the first record of this species from 

 the southwest. 



Genus LEUCOSTOMA Meigen. 



LEUCOSTOMA SENILIS Townsend. 



Three specimens from mesa July 24. This species is undoubtedly 

 distinct from neomexicana Townsend, which Mr. Coquillett placed in 

 the synonymy. 



Genus CLYTIOMYIA Rondani. 

 CLYTIOMYIA FLAVA Townsend. 



A male and two females from sunflowers August 1 to 12. 



Genus HETEROPTERINA Maequart. 

 HETEROPTERINA NASONI Coquillett. 



A few specimens of this minute species were collected on mesa. An 

 unpublished note by C. N. Ainslie, bearing Webster No. 6112 in the 

 files of the Bureau of Entomology, records the rearing of two speci- 

 mens of this fly from grasshoppers at Payson, Utah, July 10, 1911. 

 The first indication of its host relations. 



